Dishwashing machine



g- 2 1940. P. R. POWELL ET AL 2,212,649

DISHWASHING MACHINE Filed May 6, 1939 2 19.3 67 1 FM/AAA A a [NVE VTORSPaul I? Powel/ and BY Huber W Bade/(er:

A T TORNE Y Patented Aug. 27,- 1940 UNITED STATES DISHWASHING MACHINEPaul R. Powell, Kansas City, Mo., and Huber W. t

Badeker, Kansas City, Kans.

Application May 6, 1939, Serial No. 272,192

7 Claims.

This invention relates to washing machines and more particularly to amachine for washing dishes and the like.

Dishwashing machines usually comprise a closed housing arranged tosupport the articles to be washed above a washing medium and provisionis ordinarily made for then applying the washing medium to the articlesto cleanse the same.

The principal objects of the present invention are to provide animproved arrangement for ap plying a washing medium to the articles tobe Washed; to provide for distributing the washing medium throughout thehousing; to move a large quantity of water over the dishes to be Washed;to apply the medium in forceful sprays; to provide for using a minimumamount of washing medium; to provide for controlling direction anddistribution of the spray; to provide improved hous 20 ing and washingmedium impelling devices of such a character as to make dishwashing withmachines simple, economical and efiicient; and to provide improvedelements and arrangements of elements in a machine of this character.

In accomplishing these and other objects of the present invention, wehave provided improved details of structure, the preferred form of whichis illustrated in the accompanying drawing, wherein:

Fig. 1 is a perspective view of a dishwashing machine constructed inaccordance with the present invention, a part of the'housing beingbroken away to show a fluid medium impeller and its relation to thehousing.

Fig. 2 is a substantially central vertical longitudinal cross-sectionthrough one shaft of the machine particularly showing the relation ofthe impellers 'to the articles being washed and the action of thewashing medium on the articles.

Fig, 3 is a transverse vertical section through the machinesubstantially on the line 3-3, Fig. 1, particularly illustrating therelation of the pairs of impellers to each other.

Fig. 4 is a detail perspective view of an impeller embodying thefeatures of the present invention.

Referring more in detail to the drawing:

I generally designates a dishwashing machine constructed in accordancewith the present invention, which preferably consists of a housingcomprising end walls 2 and 3 and side walls 4 and 5 having water-tightconnection with each other at their edges, the housing being provided 5with a closure 6 of suitable type for confining spray and impelledwashing medium in the housing.

The side and end walls of the housing are preferably curved at theirlower edges to form separate wells 1 and 8 for washing medium 9, such aswater, in which a suitable detergent may be placed. The wells 1 and 8may be provided with suitable preferably valved outlets, not shown, fordraining washing medium from the wells of the housing after'it hasserved its purpose.

More particularly, the side walls 4 and 5 are curved downwardly andinwardly substantially on the arcs of duplicate circles, as shown inFig. 3, and then upwardly adjacent the longitudinal center line of thehousing to terminate in a common ridge it, thus forming a bottom for thehousing which constitutes or defines the washing medium wells l and 8.The end walls 2 and 3 are also provided at their lower ends with arcuateedges ii and i2, Fig. 1, conforming to the arcs defining the bottom wallof the housing where they are joined to the bottom wall in a suitablemanner to complete the housing.

Each of the end walls is provided with pairs of aligned apertures forseating and supporting bearings 93 and Hi for a pair of duplicate shaftsi5 and it which are rotatably mounted in the bearings, the bearingsbeing arranged in the end Wall apertures in such a manner as to preventseepage of washing medium out of the walls of the housing.

Keyed on the shafts at one end thereof exteriorly of the housing arepulleys ii and i8 which are interconnected, as by a belt E9, the belt l9passing over a pulley 28 on the drive shaft of a prime mover, such as anelectric motor 2!, secured to the undercarriage 22 on which the housingrests. Suitable standards 23 are also provided on the undercarriage insupporting contact with the housing for maintaining the housing above afloor a convenient distance.

2t, Fig. 4, designates an impeller embodying important features of thepresent invention, which preferably consists of a substantially flatcircular shaped plate 25 which constitutes a slinger ring.

A frusto-conically shaped bell-like extension 25 is engaged with theplate 25 on one side thereof, as by casting the impeller in singleelement,

with the smaller end of the extension concentrically arranged relativeto and adjacent the center of the plate 25, the outer peripheral edge ofthe extension 26 being substantially in alignment with and of the samediameter as the periphery of the plate 25, said peripheries being 55 inspaced relation to each other. Mounted between the adjacent surfaces ofthe plate and extension 26 is a. series of radial vanes 21 which arepreferably perpendicular to the plane of the plate and aid ininterconnecting and bracing the plate and extension relative to eachother. The inner surface of the extension 26 is provided with fins 28substantially radially arranged in a spaced series about the innersurface of the extension. As shown in Figs. 3 and 4, the fins 28, andparticularly the inner edges thereof connecting the fins to theextension are preferably arranged at an angle to and extend outwardlyfrom opposite sides of a radial plane passing from the longitudinal axisof the shaft on which the extension is mounted to the outer periphery ofthe extension. The fins 28 are also preferably angular-1y disposedrelative to a chord connecting a pair of upper inner corners of thefins, as shown.

The fins are also preferably arranged to extend forwardly at an angle inthe direction of rotation of the shaft in such a manner that the outeredges thereof bite into the washing medium and enhance the pick-upaction of the impellers.

A rack 29 or other suitable support, for dishes 30 or the like to becleaned, is mounted in the housing in upwardly spaced relation to thegreatest height of the impellers 24, as clearly shown in Figs. 2 and 3,and preferably rests on a pcripheral flange 3| suitably fixed to theinterior surfaces of the housing walls and forming a ledge support forthe frame 32 of the rack. A screen 33 or the like is also providedbetween the rack and the impellers, the screen if desired forming abottom support for the dishes and the like, but of large enough mesh toallow passage of matter of which the dishes have been cleansed into thewells 7 and 8, thereby maintaining the washing medium in a relativelyclear state over longer periods of time than would ordinarily bepossible.

In assembling the impellers on their shafts, it has been found desirableto mount impellers 34, Fig. 2, on the shafts I5 and IE at one end of thehousing with the slinger ring 25 adjacent the end wall 2 of the housing,with the fins thereon extending substantially in the direction ofrotation of the shaft.

Pairs of impellers 35 and 36 are mounted on the shafts l5 and I6 withthe slinger rings in back to back relation and the fins extending insubstantially opposite directions to form a double impeller unit.Impellers 24 are then arranged on each of the shafts l5 and It with theslinger rings thereof adjacent the end wall 3 of the housing and thefins on the extensions reversed in relation to the fins on the impellers34 in order that all the fins on the several extensions may extend inthe direction of rotation of the shafts on which they are mounted.

The operation of a dish washing machine constructed as described is asfollows:

Washing medium, such as water of suitable temperature and containing asuitable quantity of detergent may be suitably applied to the housing tofill the wells thereof and the housing approximately to the height ofthe shafts supporting the impellers. The rack may then be filled withdishes or the like to be washed and placed on its ledge support in thehousing. The cover is then placed on the housing to confine spray andwashing medium within the housing and aid in directing the washingmedium back onto the dishes. The motor is then energized and the shaftsare rotated in unison by means of the pulley and belt connection withthe motor, rotation of the shafts rotating the impellers, the fins 28 ofwhich form pockets or dippers which pick up substantial quantities ofwater and throw such water upwardly in response to centrifugal actiondue to rotation of the impellers. The impellers on the outer ends of theshafts throw the water upwardly and inwardly through the screen of therack and upon the dishes to thoroughly wash the dishes.

The radial vanes 2! also serve as pockets to pick up water and throw thesame substantially upwardly to form a complete spray throughout theinterior of the housing. Frictional contact of the slinger rings and theperipheries of the extensions with water in the wells also picks upwater and slings" it upwardly into forcible contact with the dishes. Asshown in Fig. 2, the double impeller unit throws water upwardly andoutwardly in opposite directions, the outwardly thrown water impingingagainst water thrown. inwardly by the outer impellersjcontact betweenthe particles of water forming a spray and mist which further enhanceswashing action of the water on the dishes.

When the dishes have been thoroughly washed, the dirty water may bedrained from the wells and hot fresh rinse water applied to the wells,whereupon the operation may be repeated to rinse the dishes. The dishesmay then be left to dry in the rack and removed in dry condition withoutthe necessity of wiping the dishes.

It is apparent, therefore, that an easily operated dish washing machinehas been provided by the present invention, which is efficient inoperation and which makes dish washing by machines economical.

What we claim and desire to secure by Letters Patent is:

' 1. An impeller for a washing machine of the character describedincluding a plate, an extension on the plate, means on the extensionforming pockets in cooperation with a wall of the extension, and meansmounted on the impeller between the plate and extension forming pocketstherebetween.

2. In an impeller for a washing machine of the character described, abell-like member,

means on the inner surface of the member forming pockets in cooperationwith the inner face of the wall of the member, and a slinger plate onthe smaller end of the bell-like member.

3. In an impeller for a washing machine of the character described, abell-like member, means on the inner surface of the member formingpockets in cooperation with the inner face of the wall of the member, aslinger plate on the smaller end of the bell-like member, and vanesmounted between the slinger plate and bell-like member forming pocketsarranged to pick up washing medium in contact therewith upon rotation ofthe impeller.

4. In a washing machine of the character described, a housing, a shaftrotatably mounted in the housing, a plurality of impellers mounted onsaid shaft each including a slinger plate having an extension thereonand means on the slinger plate and extension forming pockets arranged topick up water in the housing and disperse the same in the housing, oneof said impellers being mounted adjacent one end of said shaft andarranged with the slinger plate adjacent a wall of said housing, a pairof said impellers being arranged as a unit with the slinger platesthereof in back to back relation, and another of said impellers beingmounted on the shaft with the slinger plate thereof arranged adjacent awall of said housing opposite said first-named wall.

5. An impeller for a washing machine of the character describedincluding a plate, an outwardly directed extension on the plate, andmeans arranged between the plate and the extension forming a washingmedium pick-up.

6. In a washing machine of the character described, a housing, a shaftrotatably mounted in the housing, a plurality of impellers mounted onsaid shaft each including a slinger plate having an extension thereonand means on the slinger plate and extension forming pockets arranged topick up water in the housing and disperse the same in the housing, oneof said impellers being mounted adjacent one end of said shaft andarranged with the slinger plate adjacent a wall of said housing, andanother of said impellers being mounted on the shaft with the slingerplate thereof arranged adjacent a wall of said housing opposite saidfirst-named wall.

7. An impeller for a washing machine of the character describedincluding a plate, an outwardly directed extension on the plate, meansarranged between the plate and the extension forming a washing mediumpick-up, and a substantially duplicate oppositely disposed impellerarranged adjacent said first-named impeller and cooperative therewith toform a double impeller unit.

, PAUL R. POWELL.

HUBER W. BADEKER.

